@article{PismaZhETF.45.296,
    title = {Positron annihilation in metal films},
    author = {Valiev, K. A. and Gol'danskii, V. I. and Novikov, Yu. A. and Rakov, A. V. and Filimonov, M. K. and Shantarovich, V. P.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {45},
    issue = {6},
    pages = {296},
    year = {1987},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_18754.shtml},
}